WW0887079, Watts, 4 Backflow Preventer Double Check Valve Assembly Kit, 770

This 4 IN repair kit for series 770 is designed to protect drinking water supplies from dangerous cross-connections in accordance with national plumbing codes and water authority requirements. This kit consists of two cover O-rings, two bolts O-ring, two disc and two spring assemblies for both checks. Check with local inspection authorities for installation requirements.